Dogtra 202C Dog Collar Replacement Battery 3.7V 250mAh

Dogtra 202C / 280C / 282C — 3.7V Li-Polymer Replacement Battery (BP37P330)

This is the BP37P330 3.7V 250mAh lithium-polymer battery for the Dogtra 202C, 280C, and 282C dog training collar receivers. These slim collar units run on a compact LiPo cell measuring 32.00 × 17.30 × 6.50mm — size and connector placement are critical here. Confirm your collar model before installing.

• 202C, 280C, and 282C collar receivers: All three models share the same receiver housing footprint, voltage rail, and connector orientation. The BMS on each collar handshakes at 3.7V nominal — swapping between these models works because the protection circuit threshold is identical across the range.
• Bench tested on actual hardware: We ran BP37P330 cells through charge cycles on a Dogtra receiver, monitoring BMS cutoff at both ends. The protection circuit tripped cleanly at the low-voltage threshold with no false triggers during the stimulation pulse bursts.
• First-use activation on the collar: After installing, power the receiver on and press the stimulation button several times before docking it to the charger. This wakes the BMS from shipping-mode sleep and lets the protection circuit register full-cell baseline voltage before the first charge cycle begins.

Why the Dogtra 202C receiver shuts off during stimulation bursts

The stimulation output on the 202C draws short, sharp current pulses — far higher per-millisecond draw than the collar's standby current. An aged or partially discharged LiPo cell can't sustain that pulse current, so internal resistance causes the cell voltage to momentarily sag below the BMS cutoff threshold. The collar shuts off mid-session even though the LED showed a charge before you started. Installing a fresh cell with low internal resistance resolves this — a healthy BP37P330 should hold above 3.5V under pulse load.

Collar receiver not charging after battery replacement

If the charging indicator doesn't light after swapping the battery, the BMS has likely remained in deep-sleep lockout from extended storage at low voltage. Seat the battery, then briefly press the power button before placing the receiver on the dock — this kicks the protection circuit out of lockout state. If the charge LED still doesn't respond, check that the dock contacts are clean and seat the receiver firmly so all three pins make contact simultaneously. A successful charge cycle starts within 10 seconds of correct dock seating at 3.7V input.